<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	var $_id;
	var $username;
	public function authenticate()
	{
		$user=User::model()->find('LOWER(username)=?',array(strtolower($this->username)));
 
		if($user===null)
		    $this->errorCode=self::ERROR_USERNAME_INVALID;
		else if($user->password!==($this->password))
		    $this->errorCode=self::ERROR_PASSWORD_INVALID;
		else
		{
		    $this->_id=$user->id;
		    $this->username=$user->username;
		    $auth=Yii::app()->authManager;
		    if(!$auth->isAssigned($user->role,$this->_id))
		    {
			if($auth->assign($user->role,$this->_id))
			{
			    Yii::app()->authManager->save();
			}
		    }
	    
		    $this->errorCode=self::ERROR_NONE;
		}
		return $this->errorCode==self::ERROR_NONE;
	}
}